STMPE16M31 datasheet(66/85 Pages) STMICROELECTRONICS

Part #	STMPE16M31

Description	S-Touch® 16/24-channel touchkey controller with PWM and ratio engines

PDF	85 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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66 / 85 page

Touchkey controller

STMPE16M31, STMPE24M31

66/85

Doc ID 16174 Rev 4

Touchkey controller

The touchkey controller processes raw capacitance measurement data into “touch/no-

touch” boolean data for easy usage. The 2 key filter units provides additional flexibility by

allowing the system to define a maximum number of keys that could be detected and

considered active, based on the amount of impedance change detected.

Figure 19.

Data flow in touchkey controller

Table 16.

Touchkey controller registers

Address

Reset value

R/W

Description

0x90

KEY_FILT_CTRL

0x00

R/W

General key filter control

0x92

KEY_FILT_GROUP1

0x00000000

R/W

Define channels included in key

filter group 1

0x96

KEY_FILT_GROUP2

0x00000000

R/W

Define channels included in key

filter group 2

0x9A

KEY_FILT_DATA

0x00000000

Filtered touchkey data

0xB4

TOUCH_DET

0x00000000

Touch detection register

(real time)

Obsolete

Product(s)

- Obsolete

Product(s)

STMPE16M31 Datasheet(PDF) 66 Page - STMicroelectronics

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